NEW THIS WEEK Opening dates are subject to change. Advertisement (A) ASTEROID CITY The Southwest meets the celestial — and the stage — in Wes Anderson’s latest ditty. The setting is 1955 in a tiny desert town known as Asteroid City. In the main plot, a motley crew arrives for the Asteroid Day and Junior Stargazer celebrations only to become stranded after a shocking alien encounter. But the film is much more than that. Anderson deploys a framing device in which the action that unfolds is actually a play, being featured in a televised staging shot in black and white....